.page-about {
  --about-hair: rgba(11, 42, 35, 0.16);
  --about-hair-dark: rgba(182, 242, 231, 0.24);
  --about-paper-shadow: 6px 6px 0 rgba(11, 42, 35, 0.06);
  background: var(--mist);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .about-crumbs {
  padding-top: clamp(1rem, 2.4vw, 1.7rem);
  padding-bottom: clamp(0.8rem, 2vw, 1.3rem);
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 13px;
  color: var(--rock);
}

.page-about .breadcrumbs a {
  color: var(--deep-moss);
  text-decoration: none;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--ink-green);
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-green);
  color: var(--mist);
  padding: clamp(2rem, 5vw, 3.6rem) 0 0;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(59, 227, 198, 0.18) 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: 0.55;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(125deg, #000 0%, transparent 58%);
  mask-image: linear-gradient(125deg, #000 0%, transparent 58%);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.3rem, 3vw, 2.4rem);
  min-width: 0;
}

.page-about .about-hero__eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist-cyan);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 8.6vw, 4.5rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  margin: 0.7rem 0 0;
  color: var(--mist);
}

.page-about .about-hero__lede {
  margin: 0 0 1.3rem;
  font-size: clamp(0.98rem, 1.6vw, 1.06rem);
  line-height: 1.78;
  color: var(--mist-cyan);
  max-width: 36ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.page-about .about-figures {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: clamp(1.7rem, 4vw, 2.8rem) 0 0;
  padding: 1.15rem 0 1.35rem;
  border-top: 1px solid var(--about-hair-dark);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 0.9rem;
}

.page-about .about-figures__num {
  display: block;
  font-size: clamp(1.05rem, 2.2vw, 1.42rem);
  letter-spacing: -0.02em;
  color: var(--cyan);
  line-height: 1.2;
}

.page-about .about-figures__label {
  display: block;
  margin-top: 0.28rem;
  font-size: 12.5px;
  line-height: 1.45;
  color: rgba(248, 246, 242, 0.74);
}

/* ---------- 主体双栏 ---------- */

.page-about .about-body {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2.4rem);
  padding-block: clamp(2rem, 5vw, 3.8rem);
  min-width: 0;
}

.page-about .about-index {
  min-width: 0;
}

.page-about .about-index__title {
  margin: 0 0 0.6rem;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0.35rem;
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.42rem 0.72rem;
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--deep-moss);
  background: var(--paper);
  border: 1px solid var(--about-hair);
  border-radius: 999px;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-index__list a .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--moss);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  border-color: var(--cyan);
  color: var(--ink-green);
}

.page-about .about-content {
  min-width: 0;
}

/* ---------- 章节 ---------- */

.page-about .about-sec {
  padding-block: clamp(1.5rem, 3.4vw, 2.6rem);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 0.3rem;
}

.page-about .about-sec__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.page-about .about-sec__num {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--clay);
}

.page-about .about-sec h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.6vw, 1.95rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--ink-green);
}

.page-about .about-sec p {
  margin: 0 0 0.95rem;
  font-size: clamp(0.95rem, 1.5vw, 1.02rem);
  line-height: 1.78;
  color: var(--ink);
  max-width: 62ch;
}

.page-about .about-sec p:last-child {
  margin-bottom: 0;
}

.page-about .about-quote {
  margin: 1.3rem 0 0;
  padding: clamp(1rem, 2.4vw, 1.4rem);
  background: var(--paper);
  border-left: 3px solid var(--clay);
  box-shadow: var(--about-paper-shadow);
}

.page-about .about-quote p {
  margin: 0;
  max-width: none;
  font-size: clamp(1rem, 1.9vw, 1.1rem);
  line-height: 1.65;
  font-weight: 600;
  color: var(--ink-green);
}

/* ---------- 流程 ---------- */

.page-about .about-flow {
  margin: 1.1rem 0 1.6rem;
}

.page-about .about-flow__svg {
  display: none;
  width: 100%;
  height: auto;
}

.page-about .about-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-flow__step {
  border-top: 1px solid var(--about-hair);
  padding-top: 0.55rem;
  min-width: 0;
}

.page-about .about-flow__step .mono {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--moss);
}

.page-about .about-flow__step strong {
  display: block;
  margin: 0.22rem 0 0.3rem;
  font-family: var(--font-display);
  font-size: 0.98rem;
  color: var(--ink-green);
}

.page-about .about-flow__step p {
  margin: 0;
  max-width: none;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--rock);
}

/* ---------- 图文错位行 ---------- */

.page-about .about-media-row {
  display: grid;
  gap: 1.2rem;
  min-width: 0;
}

.page-about .about-media-row__text {
  min-width: 0;
}

.page-about .about-figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--about-hair);
  background: var(--paper);
}

.page-about .about-figure figcaption {
  margin-top: 0.55rem;
  padding-left: 0.65rem;
  border-left: 2px solid var(--clay);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--rock);
}

.page-about .about-figure--wide {
  margin-bottom: 1.3rem;
}

/* ---------- 岗位折叠 ---------- */

.page-about .about-roles {
  display: grid;
  gap: 0.6rem;
  margin-top: 1rem;
}

.page-about .about-role {
  background: var(--mist);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .about-role[open] {
  border-color: var(--cyan);
  box-shadow: var(--about-paper-shadow);
}

.page-about .about-role__tab {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.78rem 0.9rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink-green);
}

.page-about .about-role__tab::-webkit-details-marker {
  display: none;
}

.page-about .about-role__tab::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--moss);
}

.page-about .about-role[open] .about-role__tab::before {
  content: "−";
  color: var(--clay);
}

.page-about .about-role__count {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--moss);
}

.page-about .about-role__body {
  padding: 0 0.9rem 0.9rem;
}

.page-about .about-role__body p {
  margin: 0;
  max-width: none;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--rock);
}

/* ---------- 看台网络 ---------- */

.page-about .about-cols {
  display: grid;
  gap: 0.2rem;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.1rem;
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0.2rem 0 0 1.5rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 1px;
  background: linear-gradient(var(--clay), rgba(185, 113, 79, 0.14));
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 0.35rem;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 1rem;
  width: 11px;
  height: 11px;
  box-sizing: border-box;
  border-radius: 50%;
  border: 2px solid var(--clay);
  background: var(--mist);
}

.page-about .about-node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.7rem;
  padding: 0.55rem 0;
  cursor: pointer;
  list-style: none;
  border-bottom: 1px dashed var(--about-hair);
}

.page-about .about-node__head::-webkit-details-marker {
  display: none;
}

.page-about .about-node__period {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clay);
}

.page-about .about-node__name {
  font-family: var(--font-display);
  font-size: clamp(0.98rem, 2vw, 1.08rem);
  font-weight: 700;
  color: var(--ink-green);
}

.page-about .about-node__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--moss);
}

.page-about .about-node[open] .about-node__head::after {
  content: "−";
  color: var(--clay);
}

.page-about .about-node__body {
  padding: 0.6rem 0 0.4rem;
}

.page-about .about-node__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 13.5px;
  line-height: 1.74;
  color: var(--rock);
}

/* ---------- 服务标准 ---------- */

.page-about .about-std {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-about .about-std__item {
  background: var(--paper);
  border-top: 3px solid var(--amber);
  padding: 1.05rem 1rem 1.15rem;
  box-shadow: 0 0 0 1px var(--about-hair);
  min-width: 0;
}

.page-about .about-std__num {
  margin: 0 0 0.4rem;
  max-width: none;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4.2vw, 2rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink-green);
}

.page-about .about-std__num span {
  margin-left: 0.25rem;
  font-size: 0.48em;
  letter-spacing: 0;
  color: var(--moss);
}

.page-about .about-std__text {
  margin: 0;
  max-width: none;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--rock);
}

/* ---------- 进一步了解 ---------- */

.page-about .about-links {
  display: grid;
  gap: 0.7rem;
}

.page-about .about-link {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 1rem 1.05rem;
  background: var(--ink-green);
  color: var(--mist);
  text-decoration: none;
  border-radius: var(--radius);
  transition: background 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-about .about-link strong {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.page-about .about-link span {
  font-size: 13px;
  line-height: 1.62;
  color: rgba(248, 246, 242, 0.76);
}

.page-about .about-link em {
  margin-top: 0.35rem;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  background: var(--deep-moss);
}

.page-about .about-more-note {
  margin: 1.1rem 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--rock);
}

.page-about .about-more-note a {
  color: var(--deep-moss);
  text-underline-offset: 3px;
}

.page-about .about-more-note a:hover,
.page-about .about-more-note a:focus-visible {
  color: var(--ink-green);
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-about .about-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 1.6rem;
  }
}

@media (min-width: 760px) {
  .page-about .about-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-flow__svg {
    display: block;
    margin-bottom: 0.15rem;
  }

  .page-about .about-flow__steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0.9rem;
  }

  .page-about .about-flow__step {
    padding-top: 0.7rem;
  }

  .page-about .about-std {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(1.8rem, 4vw, 3.6rem);
  }

  .page-about .about-media-row {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 1.6rem;
  }

  .page-about .about-media-row--reverse {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-media-row--reverse .about-figure {
    order: 2;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: 206px minmax(0, 1fr);
    align-items: start;
    gap: clamp(2rem, 4.5vw, 4rem);
  }

  .page-about .about-index {
    position: sticky;
    top: 5.4rem;
    align-self: start;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__list li {
    min-width: 0;
  }

  .page-about .about-index__list a {
    width: 100%;
    border: 0;
    border-left: 2px solid var(--about-hair);
    border-radius: 0;
    background: transparent;
    padding: 0.5rem 0.2rem 0.5rem 0.8rem;
    font-size: 13.5px;
    white-space: normal;
  }

  .page-about .about-index__list a:hover,
  .page-about .about-index__list a:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(59, 227, 198, 0.07);
  }

  .page-about .about-sec {
    padding-block: clamp(2rem, 3.6vw, 2.9rem);
  }
}

@media (min-width: 1040px) {
  .page-about .about-figures {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 1rem 1.2rem;
  }

  .page-about .about-hero__title {
    font-size: clamp(2.6rem, 5.2vw, 4.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a,
  .page-about .about-role,
  .page-about .about-link {
    transition: none;
  }
}
<<<END>>>